# ()
t1 = ('Python', 'world', 98)
print(t1, type(t1))

# 省略小括号
t3 = 'Python', 'world', 98
print(t3, type(t3))

# 内置函数 tuple()
t2 = tuple(t1)
print(t2, type(t2))

# 只有1个元素，逗号不能省略
t4 = (10,)
print(t4, type(t4))

t5 = 10,
print(t5, type(t5))

# 空元组
t6 = ()
t7 = tuple()
